Cal 33-2--Mystery Cut-outs in ISOMAT NG51 Mast

Hi Cal 33-2 owners, I'm refitting my 1986 Cal 33-2. I wasn't around when the mast was pulled and prepared prior to the boat being shipped, and there are two holes in the mast that I can't account for. There are two holes, one on each side near the top of the mast. The holes are 4" long x 7/8" wide and have rounded ends. Themast is the ISOMAT NG51 mast. I want to say that they are halyard exits, however, much lower down the mast, I have three halyard exits on the port side and two on the stbd side. These holes are 2 7/8" long x 1 13/16" wide and are cut square on the ends. At Rigrite, I can find standard mast exit plates for these holes, but can not find any for the holes near the top of the mast. Does anyone else have these holes; if so, purpose? Maybe exits for extra, external halyards? Thanks, Travis Porter